[ {
  "key" : "address",
  "oldValue" : {
    "city" : "New York",
    "zipcode" : "10001"
  },
  "newValue" : {
    "city" : "New York",
    "zipcode" : "10002"
  },
  "type" : "updated"
}, {
  "key" : "age",
  "oldValue" : 30,
  "newValue" : 31,
  "type" : "updated"
}, {
  "key" : "car",
  "newValue" : null,
  "type" : "added"
}, {
  "key" : "name",
  "oldValue" : "John",
  "type" : "unchanged"
}, {
  "key" : "pets",
  "oldValue" : [ {
    "type" : "dog",
    "name" : "Buddy"
  }, {
    "type" : "cat",
    "name" : "Whiskers"
  } ],
  "newValue" : [ {
    "type" : "dog",
    "name" : "Bobby"
  }, {
    "type" : "cat",
    "name" : "Fluffy"
  } ],
  "type" : "updated"
} ]